Reduced secondary required voltage, increased ignition efficiency DENSO engineering studies show that Double Platinum plugs can run longer with reduced erosion, minimizing spark gap growth throughout the life of the plug.

Reduced spark plug wear and erosion The DENSO Iridium Long Life plug has been selected as original equipment on many of the worlds top cars, including those from GM, Toyota, Honda, and Mitsubishi. There's a simple reason for that: these manufacturers needed the best.

Available for many performance and power sports applications, including Corvette, Viper, and Harley-Davidson The Iridium Power plug delivers greater spark energy while demanding significantly less secondary required voltage from the ignition system.

Reduced secondary required voltage, increased ignition efficiency DENSO engineering studies show that Double Platinum plugs can run longer with reduced erosion, minimizing spark gap growth throughout the life of the plug.

Four yttrium-enhanced ground electrodes provide optimum access to the air/fuel mixture for the most efficient combustion, plus the yttrium alloy ground electrodes reduce gap wear and oxidation for extended performance life

Electrode gap is factory set to provide ease of installation - never requires adjustment

Never requires gapping,the electrode gap is factory-set and never requires adjustment